Type bar head with detachable type members for typewriters and the like



March 21, G DELPONTE ET AL TYPE BAR HEAD WITH DETACHABLE TYPE MEMBERS FOR TYPEWRITERS AND THE LIKE Filed May 5, 1959 2 SheetsSheet 1 INVENTORS Gsnnnoa DELFONTE March 21, G DELPONTE ET AL TYPE BAR HEAD WITH DETACHABLE TYPE MEMBERS FOR TYPEWRITERS AND THE LIKE Flled May 5, 1959 2 Sheets-Sheet 2 ll llll \l llll 'II.

Fig. 8

GE/(Akbo ba/wewmo 5 A'rrazA/Eys TYPE BAR HE WITH DETACHABLE TYPE ligmMBERS 130R TYPEWRITERS AND THE Gerardo Deiponte, Turin, and Domenico Giannitrapani, Ivrea, Italy, assignors to lug. C. Olivetti & C., S.p.A., Via .iervis, Ivrea, Italy, a corporation of Italy Filed May 5, 1959, Ser. 'No. 811,041

Claims priority, application Italy May 10, 1958 9 (Jlaims. (Cl. 197-36) This invention relates to type bar heads for typewriters and the like having one or more slotted type members detachably mounted thereon.

A type bar is known having a type member detachab-ly mounted on the type bar head and secured thereto by means of clips, hooks or the like, normally arranged on the outside of the type member. Since the head of such a modified type bar results wider than the head of a conventional type bar, difficulties arise in mounting the modified type bars on the segment of the typewriter, while such modified type bars are more likely to jam with other type bars near the type guide during the operation of the typewriter.

The primary object of the invention is to provide a type bar head and a detachable type member therefor, having a width equal to that of a conventional type bar head.

Another object of the invention is to provide atype bar head having no mounting means arranged on the outside of the type member.

According to the invention in a type bar head having a slotted type member detachably mounted thereon, we now provide a pair of elements within said slot, and a pair of counterelements on said head for each one engaging one of said elements, one of said countere-lements being yieldable with respect to said head.

Further objects, features and advantages of the invention will become apparent from the following detailed description of some preferred embodiments thereof, taken in conjunction with the accompanying drawings, wherein:

Fig. 1 is a longitudinal sectional view of a type bar head and detachable type member according to a first embodiment of the invention;

Fig. 2 is a longitudinal sectional view of a modified form of the embodiment according to Fig. 1;

Fig. 3 is a longitudinal sectional view of a second embodiment of the invention;

Fig. 4 is a longitudinal sectional view of a modified form of the embodiment according to Fig. '3;

Fig. 5 is a longitudinal sectional view of a third embodiment of the invention;

Fig. 6 is a longitudinal sectional view of a fourth embodiment of the invention;

Fig. 7 is a longitudinal sectional view of a fifth embodiment of the invention;

Fig. 8 is a frontal view of Fig. 7;

Fig. 9 is a sectional view taken on the line IX-IX of Fig. 7.

With reference to Fig. 1, the numeral 7 indicates a typewriter type bar, the numeral 8 indicates a vertically elongated type member formed with the conventional rear slot 9 adapted to house the head 10 of the type bar 7.

Longitudinally arranged within the slot 9 and secured to a pair of depending flanking portions limiting said slot is a pair of elements or pins 13 and 14 cooperating 2,975,881 Patented Mar. 21, 1961 with a pair of shoulder like counterelements 11 and 12 arranged on the head 10 located substantially at the two ends thereof. The shoulders 11 and 12 are integral with the head 10, whereby in the manufacture of the type bars they may be directly obtained when cutting the type bar. Each one of said shoulders is adapted to engage one of said pins, the shoulder 11 being formed as an arm substantially yieldable with respect to the head 10 and adapted to yieldingly engage the pin 13 as a clip, the shoulder 12 being substantially rigid with respect to said head. The pair of shoulders 11 and 12 when en,- gaging the corresponding pins 13 and 14 provide side ice and frontal edges for the slot 9 of the type member 8,'

thereby enabling the type member 8 to be firmly and rigidly mounted on the head 10.

For detaching the type member 8 from the type bar head 10 the arm 11 will be slightly spread upwards, for example by means of a screw-driver, thus releasing the pin 13. For mounting the type member 8 on the type bar head 10 first the pin 14 is placed on the rigid shoulder 12 and thereafter the type member 8 is thrust to force the pin 13 against the shoulder 11 which is thus moved slightly upwards until it clips the pin 13.

In the modified form shown on the Fig. 2, the two elements of the type member 8 are'formed of a pair of projections 16 and 17 which in the manufacture of the type member may be obtained by milling two transverse notches 18 in the type member 8.

The second embodiment of the invention shown in Figs. 3 and 4 corresponds to Figs. 1 and 2, respectively, and is characterized by a projection 19 integral with the head lit and located between the pair of shoulders 11 and 12 for providing intermediate side and frontal edges for the slot h during operation of the type bar 7".

In the embodiments shown in Figs. 1 to'4,the two counterelements so engage the two elements as to urge them in opposed directions to approach each other.

In the embodiments shown in Figs. 5 and 6 the shoulders 11' and '12 urge the pins 13 and 14 in opposed directions as well, however, to remove them from each other.

More particularly, in Fig. 5 the pin. 13 is engaged by the lower yieldable shoulder 11', while the pin 14 is forced within a notch 20 of the rigid shoulder 12. The intermediate projection 19' of the type bar insures large side and frontal edges to the slot 9.

In the embodiment shown in Fig. 6 the type bar head comprises a pair of substantially rigid shoulders 12 and 22 integral with the type bar head for each one engaging one or the two pins 13 and 14, and a yieldable tongue formed of a leaf spring 11 soldered to the type bar, the pin 13 being clipped between said tongue and the shoulder 22.

Figs. 7, 8 and 9 show an embodiment of the invention applied to a type bar carrying a set of homogeneous but variable types 23, for example the types of the date or of a pair of initials individually removably mounted on the type bar head.

The types 23 are half as wide as the conventional types and are assembled in a slotted type assembly detachably mounted on the type bar head 10. Said type assembly is formed of an assembling cage 24 (Fig. 9) formed with a pair of flanking portions 525 limiting the slot of the type assembly. The portions 25 are connected by an intermediate transverse plate 26 (Fig. 7) formed with a cylindrical portion 27 adapted to engage a notch 28 provided on each type 23.

The cage 24 is adapted to house a set of four types 23 divided in two groups forming a lower case type member 30 (Fig. 8) and an upper case type member 29. The type members 29 and are each one provided with an element such as a pair of abutments 16 and 17 respectively, formed on the corresponding pair of types 23. Said pairs of abutments are located within the flanking portions and are adapted to be engaged by the yieldable shoulder 11 and the rigid shoulder 12, respectively.

Upon placing the types 23 into the cage 24 the type assembly may be mounted on the type bar head 10 in the same manner as the single type member shown in Fig. 2.

It will be understood that many changes and improvements in the form and details of the type bar head and type member illustrated may be made by those skilled in the art without departing from the spirit of the invention.

What we claim is:

1. In a type bar head having an elongated slotted type member detachably mounted thereon, a pair of elements longitudinally arranged within said slot, and a pair of counter-elements integral with said head for each one engaging one of said elements, one of said counterelements being yieldable with respect to said head, said counterelements being arranged to urge the engaged elements in opposite directions.

2. In a type bar head having an elongated slotted type member detachably mounted thereon, said slot being delimited by a pair of depending flanking portions of said type member, a pair of longitudinally arranged pins secured to said flanking portions within said slot, a shoulder integral with said head for engaging one of said pins, and a clip integral with said head for yieldingly engaging the other pin, said shoulder and clip urging the engaged pins in opposite directions.

3. In a type bar head having an elongated slotted type member detachably mounted thereon, a pair of elements longitudinally arranged within said slot and integral with said type member, and a pair of counterelements integral with said head for each one engaging one of said elements, one of said counterelements being yieldable with respect to said head, said counterelements being arranged to urge the engaged elements in opposite directions.

4. In a type bar head having an elongated slotted type member detachably mounted thereon, a pair of elements longitudinally arranged within said slot, and a pair of counterelements integral with said head for each one engaging one of said elements, said counterelements pro- '4 viding side and frontal edges for said slot, one of said counter-elements being yieldable with respect to said head, said counterelements being arranged to urge the engaged elements in opposite directions.

5. In a type bar head having a slotted type member detachably mounted thereon, a pair of elements within said slot substantially at the two ends thereof, a pair of counterelements on said head for each one engaging one of said elements, said counterelements providing side and frontal edges for said slot at said two ends thereof, one of said counterelements being yieldable with respect to said head, and a projection integral with said head between said pair of counterelements for providing intermediate side and frontal edges for said slot.

6. In a type bar head having a slotted type assembly detachably mounted thereon, and including an upper case type member and a lower case type member, an element on each type member within said slot, and a pair of counterelements on said head for each one engaging one of said elements, one of said counterelements being yieldable with respect to said head.

7. A type bar head as defined in claim 6, characterized in that each one of said type members includes a pair of detachable types.

8. In a type bar head having a slotted type assembly cage detachably mounted thereon, said cage including an upper case type member and a lower case type member, said slot being limited by a pair of depending flanking portions comprised in said cage, an abutment on each type member within said flanking portions, and a pair of shoulders integral with said head for each one engaging one of said abutments, one of said shoulders being yieldable with respect to said head.

9. A type bar head as defined in claim 8, characterized in that each one of said type members includes a pair of detachable types.

References Cited in the file of this patent UNITED STATES PATENTS 1,090,597 Busz Mar. 17, 191 r 1,776,246 Aldritt Sept. 23, 1930 FOREIGN PATENTS 12,711 Great Britain of 1904 

